Video and lesson investigations on the topic of sound. Key concepts include:
- Sound can tell us and other animals what is going on. Sounds can act as warnings.
- Sound is used when animals communicate with each other Sound can act as a signal.
- Sometimes the sound can symbolize a message of safety, or of danger. Many animals can interpret sound messages from humans.
- Some animals rely on sound to warn them of danger.
- Others use sound to locate their prey
- Animals that live in the depths of the ocean cannot use either their eyes or their noses to gather much information.
- Hearing must fill the gap.
- For example, whales and dolphins force air past valves and flaps to produce clicks, moans and whistles as they communicate with others of their species.
- Bats use the echoes of sounds from objects to navigate.